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The pseudogap and anisotropic thermal expansion in RMn(4)Al(8) (R = La,Y,Lu and Sc).

Authors
  • Muro, Y
  • Nakamura, H
  • Kohara, T
Type
Published Article
Journal
Journal of physics. Condensed matter : an Institute of Physics journal
Publication Date
Apr 26, 2006
Volume
18
Issue
16
Pages
3931–3936
Identifiers
DOI: 10.1088/0953-8984/18/16/003
PMID: 21690749
Source
Medline
License
Unknown

Abstract

The temperature dependence of the magnetic susceptibility shows a broad maximum at ∼550 and 630 K for LuMn(4)Al(8) and ScMn(4)Al(8), respectively, which can be interpreted as due to the presence of a pseudogap in the effective bands as in LaMn(4)Al(8) and YMn(4)Al(8). The anisotropic thermal expansion observed for RMn(4)Al(8) (R = La, Y, Lu and Sc) and the sensitive volume dependence of the gap width throughout the RMn(4)Al(8) system suggest dominant magnetic coupling in Mn spin chains along the c axis.

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